Petrified Forest National Park is located in Navajo and Apache counties, in the state of Arizona, United States. The park protects large deposits of fossils, especially fallen trees in the form of petrified wood and over 600 archeological sites, including petroglyphs.
As stated in the foundation document:
The purpose of Petrified Forest National Park is to preserve and protect globally significant fossils, including petrified wood, nationally significant prehistoric and historic resources, as well as scenic values, in order to foster scientific research, public understanding, and enjoyment.